Home / 20,745.12-28,627.92-11,313.12

Finding the Fourth Proportional to 20,745.12, 28,627.92 and 11,313.12

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Solution

The fourth proportional to 20,745.12, 28,627.92 and 11,313.12 is: 15,611.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,745.12 : 28,627.92 = 11,313.12 : x
  2. Step 2: Convert to fraction form
    20,745.12/28,627.92 = 11,313.12/x
  3. Step 3: Cross multiply
    20,745.12x = 28,627.92 × 11,313.12
  4. Step 4: Simplify right side
    20,745.12x = 323,871,094.31
  5. Step 5: Solve for x
    x = 323,871,094.31/20,745.12
  6. Step 6: Final answer
    x = 15,611.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.